Alignment of amino acid sequences of S. melanostictus chitinase (SmeChi-1 and SmeChi-2), with P. trilineatum chitinase (PtChi-1 and PtChi-2), Epinephelus coioides chitinase (EcChi-1 and EcChi-2), Paralichthys olivaceus chitinase (fChi1 and fChi2) and human acidic mammalian chitinase (human AMCase). GenBank accession nos.: SmeChi-1, AB985610; SmeChi-2, AB985611; PtChi-1, AB642677; PtChi-2, AB642678; EcChi-1, FJ169895; EcChi-2, FJ169894; fChi1, AB121732; fChi2, AB121734; human AMCase, AF290004. The text surrounded by a dotted line indicates the N-terminal amino acid sequences of purified SmeChiA and SmeChiB, respectively. Identical residues of S. marmoratus stomach chitinase are shown with a gray background. Identical residues of SmeChi-1 only are shown with a red-letter. Identical residues of SmeChi-2 only are shown with a blue-letter.